app/controllers/users_controller.rb

   1 class UsersController < ApplicationController
   2   layout "site", :except => [:api_details]
   3
   4   skip_before_action :verify_authenticity_token, :only => [:api_read, :api_users, :api_details, :api_gpx_files, :auth_success]
   5   before_action :disable_terms_redirect, :only => [:terms, :save, :logout, :api_details]
   6   before_action :authorize, :only => [:api_details, :api_gpx_files]
   7   before_action :authorize_web, :except => [:api_read, :api_users, :api_details, :api_gpx_files]
   8   before_action :set_locale, :except => [:api_read, :api_users, :api_details, :api_gpx_files]
   9   before_action :api_deny_access_handler, :only => [:api_read, :api_users, :api_details, :api_gpx_files]
  10
  11   authorize_resource
  12
  13   before_action :require_self, :only => [:account]
  14   before_action :check_database_readable, :except => [:login, :api_read, :api_users, :api_details, :api_gpx_files]
  15   before_action :check_database_writable, :only => [:new, :account, :confirm, :confirm_email, :lost_password, :reset_password, :go_public, :make_friend, :remove_friend]
  16   before_action :check_api_readable, :only => [:api_read, :api_users, :api_details, :api_gpx_files]
  17   before_action :require_cookies, :only => [:new, :login, :confirm]
  18   around_action :api_call_handle_error, :only => [:api_read, :api_users, :api_details, :api_gpx_files]
  19   before_action :lookup_user_by_id, :only => [:api_read]
  20   before_action :lookup_user_by_name, :only => [:set_status, :delete]
  21   before_action :allow_thirdparty_images, :only => [:show, :account]
  22
  23   def terms
  24     @legale = params[:legale] || OSM.ip_to_country(request.remote_ip) || DEFAULT_LEGALE
  25     @text = OSM.legal_text_for_country(@legale)
  26
  27     if request.xhr?
  28       render :partial => "terms"
  29     else
  30       @title = t "users.terms.title"
  31
  32       if current_user&.terms_agreed?
  33         # Already agreed to terms, so just show settings
  34         redirect_to :action => :account, :display_name => current_user.display_name
  35       elsif current_user.nil? && session[:new_user].nil?
  36         redirect_to :action => :login, :referer => request.fullpath
  37       end
  38     end
  39   end
  40
  41   def save
  42     @title = t "users.new.title"
  43
  44     if params[:decline]
  45       if current_user
  46         current_user.terms_seen = true
  47
  48         flash[:notice] = t("users.new.terms declined", :url => t("users.new.terms declined url")).html_safe if current_user.save
  49
  50         if params[:referer]
  51           redirect_to params[:referer]
  52         else
  53           redirect_to :action => :account, :display_name => current_user.display_name
  54         end
  55       else
  56         redirect_to t("users.terms.declined")
  57       end
  58     elsif current_user
  59       unless current_user.terms_agreed?
  60         current_user.consider_pd = params[:user][:consider_pd]
  61         current_user.terms_agreed = Time.now.getutc
  62         current_user.terms_seen = true
  63
  64         flash[:notice] = t "users.new.terms accepted" if current_user.save
  65       end
  66
  67       if params[:referer]
  68         redirect_to params[:referer]
  69       else
  70         redirect_to :action => :account, :display_name => current_user.display_name
  71       end
  72     else
  73       self.current_user = session.delete(:new_user)
  74
  75       if check_signup_allowed(current_user.email)
  76         current_user.data_public = true
  77         current_user.description = "" if current_user.description.nil?
  78         current_user.creation_ip = request.remote_ip
  79         current_user.languages = http_accept_language.user_preferred_languages
  80         current_user.terms_agreed = Time.now.getutc
  81         current_user.terms_seen = true
  82
  83         if current_user.auth_uid.blank?
  84           current_user.auth_provider = nil
  85           current_user.auth_uid = nil
  86         end
  87
  88         if current_user.save
  89           flash[:piwik_goal] = PIWIK["goals"]["signup"] if defined?(PIWIK)
  90
  91           referer = welcome_path
  92
  93           begin
  94             uri = URI(session[:referer])
  95             %r{map=(.*)/(.*)/(.*)}.match(uri.fragment) do |m|
  96               editor = Rack::Utils.parse_query(uri.query).slice("editor")
  97               referer = welcome_path({ "zoom" => m[1],
  98                                        "lat" => m[2],
  99                                        "lon" => m[3] }.merge(editor))
 100             end
 101           rescue StandardError
 102             # Use default
 103           end
 104
 105           if current_user.status == "active"
 106             session[:referer] = referer
 107             successful_login(current_user)
 108           else
 109             session[:token] = current_user.tokens.create.token
 110             Notifier.signup_confirm(current_user, current_user.tokens.create(:referer => referer)).deliver_later
 111             redirect_to :action => "confirm", :display_name => current_user.display_name
 112           end
 113         else
 114           render :action => "new", :referer => params[:referer]
 115         end
 116       end
 117     end
 118   end
 119
 120   def account
 121     @tokens = current_user.oauth_tokens.authorized
 122
 123     if params[:user] && params[:user][:display_name] && params[:user][:description]
 124       if params[:user][:auth_provider].blank? ||
 125          (params[:user][:auth_provider] == current_user.auth_provider &&
 126           params[:user][:auth_uid] == current_user.auth_uid)
 127         update_user(current_user, params)
 128       else
 129         session[:new_user_settings] = params
 130         redirect_to auth_url(params[:user][:auth_provider], params[:user][:auth_uid])
 131       end
 132     elsif errors = session.delete(:user_errors)
 133       errors.each do |attribute, error|
 134         current_user.errors.add(attribute, error)
 135       end
 136     end
 137     @title = t "users.account.title"
 138   end
 139
 140   def go_public
 141     current_user.data_public = true
 142     current_user.save
 143     flash[:notice] = t "users.go_public.flash success"
 144     redirect_to :action => "account", :display_name => current_user.display_name
 145   end
 146
 147   def lost_password
 148     @title = t "users.lost_password.title"
 149
 150     if params[:user] && params[:user][:email]
 151       user = User.visible.find_by(:email => params[:user][:email])
 152
 153       if user.nil?
 154         users = User.visible.where("LOWER(email) = LOWER(?)", params[:user][:email])
 155
 156         user = users.first if users.count == 1
 157       end
 158
 159       if user
 160         token = user.tokens.create
 161         Notifier.lost_password(user, token).deliver_later
 162         flash[:notice] = t "users.lost_password.notice email on way"
 163         redirect_to :action => "login"
 164       else
 165         flash.now[:error] = t "users.lost_password.notice email cannot find"
 166       end
 167     end
 168   end
 169
 170   def reset_password
 171     @title = t "users.reset_password.title"
 172
 173     if params[:token]
 174       token = UserToken.find_by(:token => params[:token])
 175
 176       if token
 177         self.current_user = token.user
 178
 179         if params[:user]
 180           current_user.pass_crypt = params[:user][:pass_crypt]
 181           current_user.pass_crypt_confirmation = params[:user][:pass_crypt_confirmation]
 182           current_user.status = "active" if current_user.status == "pending"
 183           current_user.email_valid = true
 184
 185           if current_user.save
 186             token.destroy
 187             flash[:notice] = t "users.reset_password.flash changed"
 188             successful_login(current_user)
 189           end
 190         end
 191       else
 192         flash[:error] = t "users.reset_password.flash token bad"
 193         redirect_to :action => "lost_password"
 194       end
 195     else
 196       head :bad_request
 197     end
 198   end
 199
 200   def new
 201     @title = t "users.new.title"
 202     @referer = params[:referer] || session[:referer]
 203
 204     append_content_security_policy_directives(
 205       :form_action => %w[accounts.google.com *.facebook.com login.live.com github.com meta.wikimedia.org]
 206     )
 207
 208     if current_user
 209       # The user is logged in already, so don't show them the signup
 210       # page, instead send them to the home page
 211       if @referer
 212         redirect_to @referer
 213       else
 214         redirect_to :controller => "site", :action => "index"
 215       end
 216     elsif params.key?(:auth_provider) && params.key?(:auth_uid)
 217       self.current_user = User.new(:email => params[:email],
 218                                    :email_confirmation => params[:email],
 219                                    :display_name => params[:nickname],
 220                                    :auth_provider => params[:auth_provider],
 221                                    :auth_uid => params[:auth_uid])
 222
 223       flash.now[:notice] = render_to_string :partial => "auth_association"
 224     else
 225       check_signup_allowed
 226
 227       self.current_user = User.new
 228     end
 229   end
 230
 231   def create
 232     self.current_user = User.new(user_params)
 233
 234     if check_signup_allowed(current_user.email)
 235       session[:referer] = params[:referer]
 236
 237       current_user.status = "pending"
 238
 239       if current_user.auth_provider.present? && current_user.pass_crypt.empty?
 240         # We are creating an account with external authentication and
 241         # no password was specified so create a random one
 242         current_user.pass_crypt = SecureRandom.base64(16)
 243         current_user.pass_crypt_confirmation = current_user.pass_crypt
 244       end
 245
 246       if current_user.invalid?
 247         # Something is wrong with a new user, so rerender the form
 248         render :action => "new"
 249       elsif current_user.auth_provider.present?
 250         # Verify external authenticator before moving on
 251         session[:new_user] = current_user
 252         redirect_to auth_url(current_user.auth_provider, current_user.auth_uid)
 253       else
 254         # Save the user record
 255         session[:new_user] = current_user
 256         redirect_to :action => :terms
 257       end
 258     end
 259   end
 260
 261   def login
 262     session[:referer] = params[:referer] if params[:referer]
 263
 264     if params[:username].present? && params[:password].present?
 265       session[:remember_me] ||= params[:remember_me]
 266       password_authentication(params[:username], params[:password])
 267     end
 268   end
 269
 270   def logout
 271     @title = t "users.logout.title"
 272
 273     if params[:session] == session.id
 274       if session[:token]
 275         token = UserToken.find_by(:token => session[:token])
 276         token&.destroy
 277         session.delete(:token)
 278       end
 279       session.delete(:user)
 280       session_expires_automatically
 281       if params[:referer]
 282         redirect_to params[:referer]
 283       else
 284         redirect_to :controller => "site", :action => "index"
 285       end
 286     end
 287   end
 288
 289   def confirm
 290     if request.post?
 291       token = UserToken.find_by(:token => params[:confirm_string])
 292       if token&.user&.active?
 293         flash[:error] = t("users.confirm.already active")
 294         redirect_to :action => "login"
 295       elsif !token || token.expired?
 296         flash[:error] = t("users.confirm.unknown token")
 297         redirect_to :action => "confirm"
 298       else
 299         user = token.user
 300         user.status = "active"
 301         user.email_valid = true
 302         flash[:notice] = gravatar_status_message(user) if gravatar_enable(user)
 303         user.save!
 304         referer = token.referer
 305         token.destroy
 306
 307         if session[:token]
 308           token = UserToken.find_by(:token => session[:token])
 309           session.delete(:token)
 310         else
 311           token = nil
 312         end
 313
 314         if token.nil? || token.user != user
 315           flash[:notice] = t("users.confirm.success")
 316           redirect_to :action => :login, :referer => referer
 317         else
 318           token.destroy
 319
 320           session[:user] = user.id
 321
 322           redirect_to referer || welcome_path
 323         end
 324       end
 325     else
 326       user = User.find_by(:display_name => params[:display_name])
 327
 328       redirect_to root_path if user.nil? || user.active?
 329     end
 330   end
 331
 332   def confirm_resend
 333     user = User.find_by(:display_name => params[:display_name])
 334     token = UserToken.find_by(:token => session[:token])
 335
 336     if user.nil? || token.nil? || token.user != user
 337       flash[:error] = t "users.confirm_resend.failure", :name => params[:display_name]
 338     else
 339       Notifier.signup_confirm(user, user.tokens.create).deliver_later
 340       flash[:notice] = t("users.confirm_resend.success", :email => user.email, :sender => SUPPORT_EMAIL).html_safe
 341     end
 342
 343     redirect_to :action => "login"
 344   end
 345
 346   def confirm_email
 347     if request.post?
 348       token = UserToken.find_by(:token => params[:confirm_string])
 349       if token&.user&.new_email?
 350         self.current_user = token.user
 351         current_user.email = current_user.new_email
 352         current_user.new_email = nil
 353         current_user.email_valid = true
 354         gravatar_enabled = gravatar_enable(current_user)
 355         if current_user.save
 356           flash[:notice] = if gravatar_enabled
 357                              t("users.confirm_email.success") + " " + gravatar_status_message(current_user)
 358                            else
 359                              t("users.confirm_email.success")
 360                            end
 361         else
 362           flash[:errors] = current_user.errors
 363         end
 364         token.destroy
 365         session[:user] = current_user.id
 366         redirect_to :action => "account", :display_name => current_user.display_name
 367       elsif token
 368         flash[:error] = t "users.confirm_email.failure"
 369         redirect_to :action => "account", :display_name => token.user.display_name
 370       else
 371         flash[:error] = t "users.confirm_email.unknown_token"
 372       end
 373     end
 374   end
 375
 376   def api_read
 377     if @user.visible?
 378       render :action => :api_read, :content_type => "text/xml"
 379     else
 380       head :gone
 381     end
 382   end
 383
 384   def api_details
 385     @user = current_user
 386     render :action => :api_read, :content_type => "text/xml"
 387   end
 388
 389   def api_users
 390     raise OSM::APIBadUserInput, "The parameter users is required, and must be of the form users=id[,id[,id...]]" unless params["users"]
 391
 392     ids = params["users"].split(",").collect(&:to_i)
 393
 394     raise OSM::APIBadUserInput, "No users were given to search for" if ids.empty?
 395
 396     @users = User.visible.find(ids)
 397
 398     render :action => :api_users, :content_type => "text/xml"
 399   end
 400
 401   def api_gpx_files
 402     doc = OSM::API.new.get_xml_doc
 403     current_user.traces.reload.each do |trace|
 404       doc.root << trace.to_xml_node
 405     end
 406     render :xml => doc.to_s
 407   end
 408
 409   def show
 410     @user = User.find_by(:display_name => params[:display_name])
 411
 412     if @user &&
 413        (@user.visible? || (current_user&.administrator?))
 414       @title = @user.display_name
 415     else
 416       render_unknown_user params[:display_name]
 417     end
 418   end
 419
 420   def make_friend
 421     @new_friend = User.find_by(:display_name => params[:display_name])
 422
 423     if @new_friend
 424       if request.post?
 425         friend = Friend.new
 426         friend.befriender = current_user
 427         friend.befriendee = @new_friend
 428         if current_user.is_friends_with?(@new_friend)
 429           flash[:warning] = t "users.make_friend.already_a_friend", :name => @new_friend.display_name
 430         elsif friend.save
 431           flash[:notice] = t "users.make_friend.success", :name => @new_friend.display_name
 432           Notifier.friend_notification(friend).deliver_later
 433         else
 434           friend.add_error(t("users.make_friend.failed", :name => @new_friend.display_name))
 435         end
 436
 437         if params[:referer]
 438           redirect_to params[:referer]
 439         else
 440           redirect_to :action => "show"
 441         end
 442       end
 443     else
 444       render_unknown_user params[:display_name]
 445     end
 446   end
 447
 448   def remove_friend
 449     @friend = User.find_by(:display_name => params[:display_name])
 450
 451     if @friend
 452       if request.post?
 453         if current_user.is_friends_with?(@friend)
 454           Friend.where(:user_id => current_user.id, :friend_user_id => @friend.id).delete_all
 455           flash[:notice] = t "users.remove_friend.success", :name => @friend.display_name
 456         else
 457           flash[:error] = t "users.remove_friend.not_a_friend", :name => @friend.display_name
 458         end
 459
 460         if params[:referer]
 461           redirect_to params[:referer]
 462         else
 463           redirect_to :action => "show"
 464         end
 465       end
 466     else
 467       render_unknown_user params[:display_name]
 468     end
 469   end
 470
 471   ##
 472   # sets a user's status
 473   def set_status
 474     @user.status = params[:status]
 475     @user.save
 476     redirect_to user_path(:display_name => params[:display_name])
 477   end
 478
 479   ##
 480   # delete a user, marking them as deleted and removing personal data
 481   def delete
 482     @user.delete
 483     redirect_to user_path(:display_name => params[:display_name])
 484   end
 485
 486   ##
 487   # display a list of users matching specified criteria
 488   def index
 489     if request.post?
 490       ids = params[:user].keys.collect(&:to_i)
 491
 492       User.where(:id => ids).update_all(:status => "confirmed") if params[:confirm]
 493       User.where(:id => ids).update_all(:status => "deleted") if params[:hide]
 494
 495       redirect_to url_for(:status => params[:status], :ip => params[:ip], :page => params[:page])
 496     else
 497       @params = params.permit(:status, :ip)
 498
 499       conditions = {}
 500       conditions[:status] = @params[:status] if @params[:status]
 501       conditions[:creation_ip] = @params[:ip] if @params[:ip]
 502
 503       @user_pages, @users = paginate(:users,
 504                                      :conditions => conditions,
 505                                      :order => :id,
 506                                      :per_page => 50)
 507     end
 508   end
 509
 510   ##
 511   # omniauth success callback
 512   def auth_success
 513     auth_info = request.env["omniauth.auth"]
 514
 515     provider = auth_info[:provider]
 516     uid = auth_info[:uid]
 517     name = auth_info[:info][:name]
 518     email = auth_info[:info][:email]
 519
 520     case provider
 521     when "openid"
 522       email_verified = uid.match(%r{https://www.google.com/accounts/o8/id?(.*)}) ||
 523                        uid.match(%r{https://me.yahoo.com/(.*)})
 524     when "google", "facebook"
 525       email_verified = true
 526     else
 527       email_verified = false
 528     end
 529
 530     if settings = session.delete(:new_user_settings)
 531       current_user.auth_provider = provider
 532       current_user.auth_uid = uid
 533
 534       update_user(current_user, settings)
 535
 536       session[:user_errors] = current_user.errors.as_json
 537
 538       redirect_to :action => "account", :display_name => current_user.display_name
 539     elsif session[:new_user]
 540       session[:new_user].auth_provider = provider
 541       session[:new_user].auth_uid = uid
 542
 543       session[:new_user].status = "active" if email_verified && email == session[:new_user].email
 544
 545       redirect_to :action => "terms"
 546     else
 547       user = User.find_by(:auth_provider => provider, :auth_uid => uid)
 548
 549       if user.nil? && provider == "google"
 550         openid_url = auth_info[:extra][:id_info]["openid_id"]
 551         user = User.find_by(:auth_provider => "openid", :auth_uid => openid_url) if openid_url
 552         user&.update(:auth_provider => provider, :auth_uid => uid)
 553       end
 554
 555       if user
 556         case user.status
 557         when "pending" then
 558           unconfirmed_login(user)
 559         when "active", "confirmed" then
 560           successful_login(user, request.env["omniauth.params"]["referer"])
 561         when "suspended" then
 562           failed_login t("users.login.account is suspended", :webmaster => "mailto:#{SUPPORT_EMAIL}").html_safe
 563         else
 564           failed_login t("users.login.auth failure")
 565         end
 566       else
 567         redirect_to :action => "new", :nickname => name, :email => email,
 568                     :auth_provider => provider, :auth_uid => uid
 569       end
 570     end
 571   end
 572
 573   ##
 574   # omniauth failure callback
 575   def auth_failure
 576     flash[:error] = t("users.auth_failure." + params[:message])
 577     redirect_to params[:origin] || login_url
 578   end
 579
 580   private
 581
 582   ##
 583   # handle password authentication
 584   def password_authentication(username, password)
 585     if user = User.authenticate(:username => username, :password => password)
 586       successful_login(user)
 587     elsif user = User.authenticate(:username => username, :password => password, :pending => true)
 588       unconfirmed_login(user)
 589     elsif User.authenticate(:username => username, :password => password, :suspended => true)
 590       failed_login t("users.login.account is suspended", :webmaster => "mailto:#{SUPPORT_EMAIL}").html_safe, username
 591     else
 592       failed_login t("users.login.auth failure"), username
 593     end
 594   end
 595
 596   ##
 597   # return the URL to use for authentication
 598   def auth_url(provider, uid, referer = nil)
 599     params = { :provider => provider }
 600
 601     params[:openid_url] = openid_expand_url(uid) if provider == "openid"
 602
 603     if referer.nil?
 604       params[:origin] = request.path
 605     else
 606       params[:origin] = request.path + "?referer=" + CGI.escape(referer)
 607       params[:referer] = referer
 608     end
 609
 610     auth_path(params)
 611   end
 612
 613   ##
 614   # special case some common OpenID providers by applying heuristics to
 615   # try and come up with the correct URL based on what the user entered
 616   def openid_expand_url(openid_url)
 617     if openid_url.nil?
 618       nil
 619     elsif openid_url.match(%r{(.*)gmail.com(/?)$}) || openid_url.match(%r{(.*)googlemail.com(/?)$})
 620       # Special case gmail.com as it is potentially a popular OpenID
 621       # provider and, unlike yahoo.com, where it works automatically, Google
 622       # have hidden their OpenID endpoint somewhere obscure this making it
 623       # somewhat less user friendly.
 624       "https://www.google.com/accounts/o8/id"
 625     else
 626       openid_url
 627     end
 628   end
 629
 630   ##
 631   # process a successful login
 632   def successful_login(user, referer = nil)
 633     session[:user] = user.id
 634     session_expires_after 28.days if session[:remember_me]
 635
 636     target = referer || session[:referer] || url_for(:controller => :site, :action => :index)
 637
 638     # The user is logged in, so decide where to send them:
 639     #
 640     # - If they haven't seen the contributor terms, send them there.
 641     # - If they have a block on them, show them that.
 642     # - If they were referred to the login, send them back there.
 643     # - Otherwise, send them to the home page.
 644     if !user.terms_seen
 645       redirect_to :action => :terms, :referer => target
 646     elsif user.blocked_on_view
 647       redirect_to user.blocked_on_view, :referer => target
 648     else
 649       redirect_to target
 650     end
 651
 652     session.delete(:remember_me)
 653     session.delete(:referer)
 654   end
 655
 656   ##
 657   # process a failed login
 658   def failed_login(message, username = nil)
 659     flash[:error] = message
 660
 661     redirect_to :action => "login", :referer => session[:referer],
 662                 :username => username, :remember_me => session[:remember_me]
 663
 664     session.delete(:remember_me)
 665     session.delete(:referer)
 666   end
 667
 668   ##
 669   #
 670   def unconfirmed_login(user)
 671     session[:token] = user.tokens.create.token
 672
 673     redirect_to :action => "confirm", :display_name => user.display_name
 674
 675     session.delete(:remember_me)
 676     session.delete(:referer)
 677   end
 678
 679   ##
 680   # update a user's details
 681   def update_user(user, params)
 682     user.display_name = params[:user][:display_name]
 683     user.new_email = params[:user][:new_email]
 684
 685     unless params[:user][:pass_crypt].empty? && params[:user][:pass_crypt_confirmation].empty?
 686       user.pass_crypt = params[:user][:pass_crypt]
 687       user.pass_crypt_confirmation = params[:user][:pass_crypt_confirmation]
 688     end
 689
 690     if params[:user][:description] != user.description
 691       user.description = params[:user][:description]
 692       user.description_format = "markdown"
 693     end
 694
 695     user.languages = params[:user][:languages].split(",")
 696
 697     case params[:image_action]
 698     when "new" then
 699       user.image = params[:user][:image]
 700       user.image_use_gravatar = false
 701     when "delete" then
 702       user.image = nil
 703       user.image_use_gravatar = false
 704     when "gravatar" then
 705       user.image = nil
 706       user.image_use_gravatar = true
 707     end
 708
 709     user.home_lat = params[:user][:home_lat]
 710     user.home_lon = params[:user][:home_lon]
 711
 712     user.preferred_editor = if params[:user][:preferred_editor] == "default"
 713                               nil
 714                             else
 715                               params[:user][:preferred_editor]
 716                             end
 717
 718     if params[:user][:auth_provider].nil? || params[:user][:auth_provider].blank?
 719       user.auth_provider = nil
 720       user.auth_uid = nil
 721     end
 722
 723     if user.save
 724       set_locale(true)
 725
 726       if user.new_email.blank? || user.new_email == user.email
 727         flash.now[:notice] = t "users.account.flash update success"
 728       else
 729         user.email = user.new_email
 730
 731         if user.valid?
 732           flash.now[:notice] = t "users.account.flash update success confirm needed"
 733
 734           begin
 735             Notifier.email_confirm(user, user.tokens.create).deliver_later
 736           rescue StandardError
 737             # Ignore errors sending email
 738           end
 739         else
 740           current_user.errors.add(:new_email, current_user.errors[:email])
 741           current_user.errors.add(:email, [])
 742         end
 743
 744         user.restore_email!
 745       end
 746     end
 747   end
 748
 749   ##
 750   # require that the user in the URL is the logged in user
 751   def require_self
 752     head :forbidden if params[:display_name] != current_user.display_name
 753   end
 754
 755   ##
 756   # ensure that there is a "user" instance variable
 757   def lookup_user_by_id
 758     @user = User.find(params[:id])
 759   end
 760
 761   ##
 762   # ensure that there is a "user" instance variable
 763   def lookup_user_by_name
 764     @user = User.find_by(:display_name => params[:display_name])
 765   rescue ActiveRecord::RecordNotFound
 766     redirect_to :action => "view", :display_name => params[:display_name] unless @user
 767   end
 768
 769   ##
 770   #
 771   def disable_terms_redirect
 772     # this is necessary otherwise going to the user terms page, when
 773     # having not agreed already would cause an infinite redirect loop.
 774     # it's .now so that this doesn't propagate to other pages.
 775     flash.now[:skip_terms] = true
 776   end
 777
 778   ##
 779   # return permitted user parameters
 780   def user_params
 781     params.require(:user).permit(:email, :email_confirmation, :display_name,
 782                                  :auth_provider, :auth_uid,
 783                                  :pass_crypt, :pass_crypt_confirmation)
 784   end
 785
 786   ##
 787   # check signup acls
 788   def check_signup_allowed(email = nil)
 789     domain = if email.nil?
 790                nil
 791              else
 792                email.split("@").last
 793              end
 794
 795     if blocked = Acl.no_account_creation(request.remote_ip, domain)
 796       logger.info "Blocked signup from #{request.remote_ip} for #{email}"
 797
 798       render :action => "blocked"
 799     end
 800
 801     !blocked
 802   end
 803
 804   ##
 805   # check if this user has a gravatar and set the user pref is true
 806   def gravatar_enable(user)
 807     # code from example https://en.gravatar.com/site/implement/images/ruby/
 808     return false if user.image.present?
 809
 810     hash = Digest::MD5.hexdigest(user.email.downcase)
 811     url = "https://www.gravatar.com/avatar/#{hash}?d=404" # without d=404 we will always get an image back
 812     response = OSM.http_client.get(URI.parse(url))
 813     oldsetting = user.image_use_gravatar
 814     user.image_use_gravatar = response.success?
 815     oldsetting != user.image_use_gravatar
 816   end
 817
 818   ##
 819   # display a message about th current status of the gravatar setting
 820   def gravatar_status_message(user)
 821     if user.image_use_gravatar
 822       t "users.account.gravatar.enabled"
 823     else
 824       t "users.account.gravatar.disabled"
 825     end
 826   end
 827 end